![]() Transactions are atomic, consistent, isolated, and durable (ACID) even after system crashes and power failures.It is used by Firefox, Skype, and McAfee anti-virus. ![]() You can find it on all iOS and Android mobile devices and on Mac OS desktops. It is the DBMS most widely deployed database in the world with a rough estimate of 500M installations. The SQLite is an embedded SQL database engine, developed by SQLite Consortium. 6 SQLite Transactions, Locking, Threads and Cursors.4.1 Mapping SQLite to FireDAC Data Types.2.6 Manage an SQLite Database from a Delphi Application.2.5 Using Multiple SQLite databases in a Delphi Application.2.4 Working with Unicode and SQLite Databases.2.3 Using an SQLite In-memory Database in a Delphi Application.2.2 Creating a SQLite Database from a Delphi Application.2.1 Connecting to the SQLite Database from a Delphi Application.For beginners, we suggest starting from the Getting Started article and looking into the FireDAC\Samples\Getting Started\SQLite demo. This article requires knowledge of the FireDAC basics and of the main library APIs. Advanced SQLite Techniques: finally we introduce some advanced SQLite concepts, such as updates logging and SQL authorization.Extending SQLite Engine: as an embedded DBMS, the SQLite engine can be extended by the Delphi application code.SQLite Transactions, Locking, and Cursors: explains how to work with transactions in an SQLite environment.SQLite SQL Commands: main aspects of the SQLite SQL dialect for Delphi application developers.Without understanding how it works, it is difficult to effectively store and retrieve the data in Delphi applications. SQLite Data Types: SQLite has a unique data type system.The topic explains how it works and how to control it. SQLite Encrypted Database: the database encryption is one of the important SQLite features.Using SQLite Database: explains how to create, connect to, and manage the SQLite database in Delphi application.Introduction to SQLite: reviews SQLite features, missed features, possible applications, and applications not for SQLite.The file itself will grow slowly (since you're not reclaiming free space like a VACUUM would) and possibly slow down queries against the database, but that sounds like a far better tradeoff than excessive wear on the drive from recreating the file so often.This reference article has several sections: By breaking the VACUUM statement with this solution, you prevent the database from getting recreated so frequently. Spotify must be triggering a VACUUM statement too aggressively (possibly after every change), rather than on a periodic schedule or after a certain amount of fragmentation. It makes the file smaller and more efficient to run queries against. SQLite's VACUUM behavior basically just recreates the entire database from scratch in a temp file, then replaces the live file with that. With databases, you issue a vacuum command to defragment a database (reclaim space from deleted/updated rows, re-sort the data, etc). The file is only about ~100MB (on my computer). ![]() Spotify stores a local SQLite database file (by default on a Mac it's at ~/Library/Application Support/Spotify/PersistentCache/mercury.db ) It likely just stops Spotify from VACUUM'ing the SQLite database it has. ![]()
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